Sighting device for ordnance



M. BARTHOLDY.

SIGHTING DEVICE FOR ORDNANCE.

APPLICATION FILED SEPT- 4, I920.

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M. BARTHOLDY.

SIGHTING DEVICE FOR ORDNANCE.

' APPLICATION FILED SEFT- 4, I920.

Patented Apr. 5, 1921.

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UNITED STATES PATENT OFFICE.

MAX BARTHOLDY, OF ESSEN, GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIEN- GESELLSCHAFT, OF ESSEN-ON-TI-IE-RUHR, GERMANY.

SIGHTING- DEVICE FOR ORDN'AINGE.

Specification of Letters Patent.

Patented Apr. 5, 1921.

Application filed September 4, 1920. Serial No. 408,393.

To all whom it may concern:

Be it known that I, MAX BARTHOLDY, residing at Essen, Germany, a citizen of the German Republic, have invented a certain new and useful Improvement in Sighting Devices for Ordnance, of which the following is a specification.

This invention refers to a sighting devlce for ordnance which is distinguished by its simplified construction and in which the firing angle corresponding to the distance away of the target is measured by the displacement of a part of a gearing relatively to the gun carriage and is unaffected by lost motion in the elevating gear of the gun.

The invention will be described with reference to the accompanying drawings which show the sighting device according to this invention.

Figure 1 is a side elevation, partially in section, of a gun provided with the slghting device,

Fig. 2 is a section on the line 22 of F 1g. 1, looking from the right, and

Fig. 3 shows on a larger scale a portion I of the section on the line 33 of Fig. 2,

looking from the left.

A denotes the gun barrel which slides in a cradle B when the gun is fired. The cradle B is pivotally mounted in the gun carriage O by means of two trunnions b lying 1n the vicinity of the breech end of the gun barrel. The gun carriage O can be rotated about a vertical axis on a pedestal D by means of a traversing gear (not shown). The elevating ear which is provided with a compensator not shown) has a toothed segment 79 attached to the cradle B and a spur wheel e gearing into it and which spur wheel is mounted on a shaft E mounted in the gun carriage O and provided with a hand wheel 6 (See Fig. 2.)

On one of the two trunnions b is rigidly mounted a sector b which is connected by two flexible steel bands F and F arranged alongside each other and adapted to be' sliding piece G moves in the direction opposite to that indicated by the arrow y.

On the sliding piece there is mounted so as to rotate but not move longitudinally a screw spindle H provided wlth a screwthreaded portion h and the axis of which falls in the direction of movement of the sliding piece. The screw-threaded part h gears into a second sliding piece J which is provided with a corresponding female screw thread and is mounted on the gun carriage and movable in the same direction as the sliding piece Or.

The sliding piece J is connected by two steel bands M and M in the same way as the sliding piece G is connected to the sector 6 to a sector K mounted on the gun carriage and rotatable about a shaft parallel with the axis of the trunnions and having the same radius as the sector 6 In this case the transmission of the movement to the sector K is eflected when the sliding piece J moves in the direction of the arrow y by means of a steel band M and when the sliding piece moves in the opposite direction by means of a steel band M The sector K carries a sighting telescope N, which is mounted in the well known way on an arm K rigidly connected to the sector K so that the line of sight can be swung in a lateral direction. The adjustment of the firing angle corresponding to the distance of the target is made by means of a shaft P mounted on the gun carriage and carrying a worm p and a hand wheel p (see particularly Fig. 2) and which worm gears into a worm wheel Q which is mounted on a long sleeve which can rotate but cannot move longitudinally on the gun carriage and incloses the screw spindle H, and is adapted to be self locking therein. The sleeve Q, the axis of rotation of which coincides with the axis of rotation of the screw spindle H, is provided with two internal longitudinal grooves 9 in which is guided a cross head it rigidly connected to the screw spindle.

The range of the target to be adjusted can be read off by means of a ointer c attached to the gun carriage on a graduation r on a drum R, which can be rotated about the same axis as the sleeve Q, and is positively connected thereto by a return toothed wheel gearing 9 T, 1*. (See Fig. 3.)

When, for the purpose of adjusting the angle of the attachment corresponding to the range of the target, the shaft P (which acts in this case as the driving member) is rotated, which rotation is transmitted through the worm gearing Q to the: sleeve Q and by this latter through the medium of the cross head 71? guided in the grooves g to the screw spindle H mounted in the sliding piece G and in consequence of the engagement of the screw-threaded part [L in the female screw thread of the sliding piece J causes the longitudinal movement of this sliding piece. Simultaneously with the sleeve Q the drum R rotates which is positively connected thereto by the toothed wheel gearing f, T, r and carries the range graduation r If the sighting device be adjusted before the commencement of the rotation of the shaft P, as is Shown in Fig. 1 so that the sighting line is parallel with the longitudinal axis of the gun barrel, the shaft P is rotated in such a direction that the sliding piece J is moved in the opposite direction to that indicated by the arrow 3 by means of the part of the gearing formed by the sleeve Q and which gearings intended for the driving of the screw h and the sector K is therefore rotated by the steel band M in the direction opposite to that indicated by the arrow m. i

The rotation of the shaft P is continued until the mark of the graduation 1' that corresponds to the desired range of the target comes opposite the pointer 0 The sighting line of the telescope N, which rotates conjointly with the sighting means carrier formed by the sector K and the arm K in the direction opposite to that indicated by the arrow 00, then is inclined with respect to the longitudinal axis of the gun and this inclination corresponds to the range of the target, that is to say, the sighting device is adjusted to the necessary attachment angle.

Vhile the shaft P and with it the sleeve Q and the graduation drum R remain at rest, the sighting line is laid on the target by the aid of the traversing gear (not shown) and elevating gear E 6 6 The gun barrel rotates here in the direction of the arrow m about the axis of the trunnions b and with it in the same direction the sector 6 which is rigidly connected to one of the trunnions and from this sector 12 the movement is transmitted through the steel band F to the sliding piece G, which here moves in the direction of the arrow y. The movement of the sliding piece G is also taken up by the screw spindle H which is mounted so as to be incapable of longitudinal movement thereon and the cross head if of which in this case slides in the longitudinal grooves 9 in the sleeve Q, which is held at rest by the automatic locking of the worm gearing 10 Q As the screw spindle H consequently is prevented also from rotating relatively to the sliding piece Gr, there is produced in consequence of the engagement of the screw threaded part b in the female screw thread of the sliding piece J on the movement noW in question, a coupling between the two sliding pieces G and J, so that the sliding piece J is moved by the sector 5 (which acts in this movement as driving member) in the same direction and with the same velocity as the sliding piece G.

The movement of the sliding piece J is so transmitted by the steel band M to the sector J, that this latter rotates in the same direction as the sector 6 and the otatio m f the two sect91's, as jflfijfmequal takes W9 1.theseneengunnvelccity- The sighting line of the sighting telescope N which moves conjointly with the sector K rotates therefore with the same angular velocity as the longitudinal axis of the gun barrel which rotates conjointly with the sector 5 The angle between the sighting line and the longitudinal axis of the gun barrel and previously adjusted by the rotation of the shaft P which angle is measured by the angle of rotation of the sleeve Q (or of the graduation drum R r positively connected thereto) remains therefore unchanged.

)Vhen therefore the position is reached in which the sighting line points on the target, it always forms with the longitudinal axis of the gun barrel the attachment angle previously adjusted by rotating the shaft P,

that is to say, the gun is aimed at the target I corresponding to the desired range.

When owing to the existence of lost motion in the elevating gear E e b of the gun aimed at the target the elevation of the gun barrel varies by a certain amount, the position of the graduation drum R 7' relatively to the pointer remains unaltered just as in the movement just described as will be clear without further explanation, the elevation of the sighting line merely alters and that by the same amount as the elevation of the gunbarrel, so that the attachment angle adjusted also remains unchanged. By the altered position of the sighting line the error, which has arisen through the alteration in the elevation of the gun barrel, is at once perceptible and can be obviated by means of reelevating the gun.

Claims:

1. A sighting device for ordnance having a gun barrel and carriage therefor which comprises a sighting telescope, a carrier therefor, means for adjusting said sighting telescope and a second sighting telescope adjusting means connected to and o eratable ,w-by the gun trunnion indepei'd'eifily o the first mentioned-means.""-- --W.,. V

2. A sighting device for ordnance which comprises a gun, a gun carriage therefor, a

sighting telescope, a sighting telescope carrier, means for adjusting said carrier, a sector mounted on a trunnion of the gun and rotatable therewith, means connecting said sector to the carrier adjusting means, said means being adjustable.

3. A sighting device for ordnance which comprises the combination with a gun and a carriage therefor of a sigl i ting t elesggp g said carrier, a second sector mounted on a trunnion of the gun and rotatable therewith, two longitudinal alined sliding pieces, one of said sliding pieces being positively connected to the telescope carrier, means for connecting said sliding pieces, a range device and means for independently adjusting said telescope positioned in alinement with said sliding pieces.

4. A sighting device for ordnance which comprises the combination with a un and a carrier therefor of a sighting evice, a sighting device carrier, a sector connected to said carrier for adjusting said sighting means, a second sector mounted upon and rotatable with a trunnion of the gun, two sliding pieces adjacent said sectors, flexible bands operatively connecting said sliding pieces to said sectors, an adjustable shaft operatively connecting said sliding pieces, a range device and an independent operating means mounted coaxial with said adjustable shaft, said independent operating means being connected with the sighting means carrier.

5. A sighting device for ordnance having a gun barrel and carriage therefor comprising a sighting means carrier rotatably mounted on the gun carriage, a gearing for adjusting said sighting means carrier, said gearing having two operating members mounted on the gun carriage and being movable independently of each other, means for adjusting one of said operating members according to the firing angle of the gun and means actuated by the gun barrel for moving the other operating member, when the gun barrel is elevated.

6. A sighting device for ordnance having a gun barrel and carriage therefor compriselevated, a screw shaft rotatable and movable longitudinally relatively to the gun carriage, said screw shaft having a threaded part engaging one of said sliding pieces and means for coupling it to the other sliding piece with respect to longitudinal movement, an operating member rotatably mounted on the gun carriage, means for adjusting said operating member according to the firing angle of the gun and means coupling the operating member to said screw shaft with respect to rotary movement but allowing the screw shaft to be moved longitudinally independently of said operating member.

A slghting device for ordnance having a gun barrel and carriage therefor comprising a sighting means carrier rotatably mounted on the gun carriage, a gearing for adjusting said sighting means carrier, said gearing having two operating members mounted on the gun carriage and being movable independently of each other, means for adjusting one of said operating members according to the firing angle of the gun and means actuated by the gun barrel for moving the other operating member, when the gun barrel is elevated, said adjusting gearing being constructed with a sector rotatably mounted on the gun carriage to be actuated by the gun barrel, a sliding piece movable on the gun carriage and two steel bands wound crosswise alongside each other on the outer surface of the sector and secured on one end to the sliding piece and on the other end to said sector.

The foregoing specification signed at Essen, Germany, this 18th day of May, 1920.

MAX BARTHOLDY. In presence of- HANs GOTTSMANN, JOSEPH OLBERTZ. 

